U.S. patent application number 09/898546 was filed with the patent office on 2003-01-02 for four tube compact fluorescent lamp.
Invention is credited to Cavallaro, Albert, Farley, Steven C., Marian, Daniel, Pai, Robert Y..
Application Number | 20030002283 09/898546 |
Document ID | / |
Family ID | 25409606 |
Filed Date | 2003-01-02 |
United States Patent
Application |
20030002283 |
Kind Code |
A1 |
Marian, Daniel ; et
al. |
January 2, 2003 |
Four tube compact fluorescent lamp
Abstract
A compact fluorescent lamp comprises four dual tube segments
affixed to a base having a planar surface. Each of the segments
extends in a direction away from the planar surface and is arranged
in a plan wherein one of the tubes of each of the four dual tube
segments is positioned at the corner of a square. This
configuration reduces the wasted area in the center of the base and
provides a smaller base thus allowing application of the lamp in
areas previously not accessible.
Inventors: |
Marian, Daniel; (Gardiner,
NY) ; Pai, Robert Y.; (Hamilton, MA) ; Farley,
Steven C.; (Montgomery, NY) ; Cavallaro, Albert;
(Florida, NY) |
Correspondence
Address: |
William H. McNeil
OSRAM SYLVANIA Inc.
100 Endicott Street
Danvers
MA
01923
US
|
Family ID: |
25409606 |
Appl. No.: |
09/898546 |
Filed: |
July 2, 2001 |
Current U.S.
Class: |
362/260 ;
362/216; 362/249.14 |
Current CPC
Class: |
Y02B 20/00 20130101;
H01J 61/325 20130101 |
Class at
Publication: |
362/260 ;
362/252; 362/216 |
International
Class: |
F21K 002/00 |
Claims
What is claimed is:
1. A compact fluorescent lamp comprising: four dual tube segments
affixed to a base having a planar surface, each of said segments
extending in a direction away from said planar surface and arranged
in a plan wherein one of the tubes of each of said four dual tube
segments is positioned at the comer of an imaginary square.
2. The compact fluorescent lamp of claim 1 wherein each of said
tubes of each of said dual tube segments has a diameter of
{fraction (4/8)} inches.
3. The compact fluorescent lamp of claim 1 wherein said lamp has a
life expectancy of 12,000 hours.
4. The compact fluorescent lamp of claim 1 wherein said lamp has a
light output of about 4000 lumens and a color rendering index of
82.
Description
TECHNICAL FIELD
[0001] This application relates to compact fluorescent lamps and
more particularly to such lamps having a reduced area with no
decrease in light output, thus allowing placement of the lamps in
locations previously adapted only for smaller lamps with less light
output.
BACKGROUND ART
[0002] Compact fluorescent lamps are generally considered to be
lamps designed for the direct replacement of ordinary household
incandescent lamps: that is, those incandescent lamps having
wattage ranges between 40 and 150 watts. Replacement lamps of the
compact fluorescent variety often have power consumption in the
range of 7 to about 22 watts with similar light output and
considerable power savings. Additionally, the compact fluorescent
lamps often have extended life expectancies when compared to the
ordinary incandescent lamps (10,000 hours compared to 2,000 hours
for long life incandescent).
[0003] These compact fluorescent lamps may have a spiral
configuration but are usually comprised of one or more segments of
dual tubes configured as an elongated U. This invention is
particularly concerned with the latter type of compact fluorescent
and still more particularly with that type of lamp composed of 4
U-shaped segments. Current lamps of the latter type have had the
U-shaped segments extending from a base and positioned on the sides
of a square, leaving a large amount of wasted space in the center
of the base and eliminating use of the lamp in a number of confined
areas.
DISCLOSURE OF INVENTION
[0004] It is therefore, an object of the invention to obviate the
disadvantages of the prior art.
[0005] It is another object of the invention to enhance the use of
compact fluorescent lamps.
[0006] Yet another object of the invention is the provision of a
compact fluorescent lamp having improved adaptability.
[0007] These objects are accomplished, in one aspect of the
invention, by a compact fluorescent lamp that comprises four dual
tube segments affixed to a base having a planar surface. Each of
the segments extends in a direction away from the planar surface
and is arranged in a plan wherein one of the tubes of each of the
four dual tube segments is positioned at the comer of an imaginary
square. This configuration reduces the wasted area in the center of
the base and provides a smaller base thus allowing application of
the lamp in areas previously not accessible. To accomplish a
similar result previously it was necessary to reduce the size of
the tubes making up the lamp and thereby reducing the light
output.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a diagrammatic plan view of a prior art compact
fluorescent lamp having four dual tube segments; and
[0009] FIG. 2 is a similar of a lamp embodying the invention.
BEST MODE FOR CARRYING OUT THE INVENTION
[0010] For a better understanding of the present invention,
together with other and further objects, advantages and
capabilities thereof, reference is made to the following disclosure
and appended claims taken in conjunction with the above-described
drawings.
[0011] Referring now to the drawings with greater particularity,
there is shown in FIG. 1 the layout of a prior art compact
fluorescent lamp 10 having a base 12, which includes a planar
surface 14. The lamp 10 comprises four dual tube segments 16
arranged along the sides of a square 18, shown in phantom lines.
This arrangement produces a base 12 having sides 20 with a length
L. Such lamps are known in the art as shown in U.S. Pat. Nos.
5,541,477 and 6,005,337. While these lamps function well, they are
limited in use because their large size base precludes their use in
many applications. For example, to replace an ordinary incandescent
lamp it is necessary for the compact fluorescent to fit within the
harp. In many instances this is not possible because of the size of
the compact fluorescent lamp. Prior solutions have simply utilized
smaller tube fluorescents with, of course, diminished light
output.
[0012] The solution provided by this invention is shown in FIG. 2
wherein a lamp 30 comprises four dual tube segments 16 identical to
those of the prior art lamp 10. However, in lamp 30 each of the
segments extends in a direction away from a planar surface 32 and
is arranged in a plan wherein one of the tubes, for example, 16a,
of each of the four dual tube segments 16 is positioned at the
corner of a square 34. This configuration reduces the wasted area
in the center of the base and provides a smaller base thus allowing
application of the lamp in areas previously not accessible. To
accomplish a similar result previously it was necessary to reduce
the size of the tubes making up the lamp and thereby reducing the
light output.
[0013] Lamps constructed according to the teachings provided herein
can have tubes of T4 size, which, with a typical amalgam filling,
will produce a light output of 4000 lumens with a color rendering
index of 82. These lamps have a life expectancy of 12,000 hours.
Further, lamps so produced have a sides 36 having a length L' which
is less than the length L of the prior art lamps.
[0014] This space saving allows the lamp of the invention to be
used in a greater variety of locations than the prior art lamps and
yet provides a lamp having greater light output than previously
smaller lamps.
[0015] While there have been shown and described what are at
present considered the preferred embodiments of the invention, it
will be apparent to those skilled in the art that various changes
and modifications can be made herein without departing from the
scope of the invention as defined by the appended claims.
* * * * *